Warp stop-motion for looms.



No. 640,150. Patented Dec. 26, i899.

` J.l H. NRTHRP.

WABP STOP MOTIUN FOR LODMS.`

(Application led Dec. 1, 1898.]

TH: Nowms PETERS cn.. Puorouwm wAsHmsToN. u. c.

No. 640,!50. Patented Dec. 26, i899. J. H. NORTHROP.

- WARP STOP MOTION FDR LOOMS.

(Application led Dec. 1, 1898.)

2 Sheets-Sheet 2.

Unirse STATES PATENT trace.

JAMES II. NORTHROP, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO THE DRAPER COMPANY, OF SAME PLACE AND PORTLAND, MAINE.

WARP STOP-MOTION FOR LOOlVlS.

SPECIFICATION forming' part of Letters Patent No. 640,150, dated December 26, 1899.

Application filed December l 1898.

To all wiz/m, t may concern:

Beit known that I, JAMES H. NORTHROP, of Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Warp Stop-Motions for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like letters and ligures on the drawings representing like parts.

This invention has for its object the production of a novel warp-stop-motion mechanism particularly adapted for use in connection with looms for weaving to effect the automatic stoppage of the loom upon breakage o1' undue slackness of one or more warp-threads.

The various novel features of the invention will be hereinafter described at length in the specification, and particularly pointed out in the claims.

Figure lis a longitudinal sectional view of a sufficient portion of a loom to be understood with one embodiment of my invention applied thereto. Fig. 2 is a top or plan View of the usual notched holding plate and showing more clearly the knock-off lever for releasing the shipper-handle. Fig. 3 is an enlarged detail, in rear elevation, of a portion of the stopmotion mechanism with the feeler-vibrating mechanism coperating therewith. Fig. 4 is a side elevation of the mechanism shown in Fig. 3, viewed from the left-hand side of the loom. Figs. 5 and 6 are vertical sectional views taken on the line :c Fig. 3, looking to the right, the mechanism in Fig. 5 being shown in normal position and in Fig. 6 with one of the detectors in abnormal position, due to breakage or undue slackness of its warpthread; and Fig. 7 is a detached detail of the wiper-cam and coperating portion of ythe knock-off mechanism to be described.

The loom-frame A, breast-beam A', lay A2, lay-swords A3, one of which is shown in Fig. l, the bearings B in the loom-frame for the journals of the warp-beam B, (shown partially in dotted lines,) the whip-roll R, the lease-rods L, the shipper-handle S, and the notched holding-plate AX therefor may be and are all of well-known or usual construction.

5o On the loom sides I have herein secured Serial No. 697,949. (No model.)

two supports, shown as brackets A4, having forward ly-extended and preferably horizontal supporting portions a, longitudinally slotted,

as at al, (see Fig. 4,) said brackets forming supports for the warp-stop-motion mechanism, the latter, as will be described, being mounted and bodily movable on said brackets between the lease-rods and whip-roll and above the warp-beam.

Two depending l'shaped stands C are rig- 6o idly1 connected by a transverse ba'r or plate cX and by thin detector supports or bars c', set on edge and secured, as by bolts 2, to the end stands C, the outwardly or laterally eX- tended heads C of the latter being shouldered on their under faces at 3, Fig. 3, and resting upon the extended supports a of the brackets A4, to which they are rigidly secured by clamping-bolts 5, extended through the slots a.

I have herein shown two series of stop-motion actuating detectors d, longitudinally slotted at d to receive the transverse supports c', the length of the slots being greater than the depth of the supports to permit longitudinal movement of said detectors relatively thereto.

The stands C have bearings c2 for a rockshaft F, extended beyond one ofthe stands, as shown in Fig. 3, andat its outer end, between 8o said stand and the bracket A4, having a rigidly-attached rocker-arm F. This rocker-arm is upturned at its free end to form a guard f, and between the guard and arm is located an oppositely-beveled toe f for a purpose to be described. Brackets C3 are secured to the inner sides of the end stands by bolts 6, and at their lower ends said brackets are bifurcated to straddle the rock-shaft F, as shown in Figs. 5 and 6, and are bent to form hook-like 9o supports C1, in which are held the ends of preferably cylindrical rods d5, located just below the plane of andforming rests for the warps w as they pass th rough the eyes d2 of the detectors, the seid warp-rests being located outside of the two series of detectors, while the rock-shaft F, located between said series of detectors, forms an intermediate warp-rest, as clearly shown in Figs. 5 and G. Vibratable feelers FX, shown as angle-irons, are attached loo to arms f3, rigidly secured to the rock-shaft F, so that as the latter is rocked the feelers will be vibrated back and forth below the lower ends of the detectors when the latter are controlled by normal warp-threads-that is to say, by warp-threads unbroken and under proper tension.

y g5 therein.

Should a warp-thread break or become unduly slack, as at wx, Fig. 6, its detector, as dx, will drop the length of its slot and its lower end will be interposed between the adjacent feeler and the separator cx to thereby stop the inward movement of such feeler, and as the latter is connected with the rock-shaft F, as has been described, said shaft and its attached rocker-arm F will also b'e held stationary.

. The acting edges of the feelers may be toothed,if desired, as atf4, Fig. 3, to provide a better engagement with the detectors.

It will be noticed that the stop-motion mechanism so far described is bodily movable upon the extended supports a, this movement being desirable in order to provide for the ready insertion or removal of the warp-beam, the whiproll being at the same time taken from its bearings. At such time the bolts 5 are loosened, and the mechanism carried by the end stands C is bodily slid forward on the supports a out of the way ofthe beam. When weaving is to be resumed, the mechanism is slid back into place against suitable shoulders 7 on the brackets A4 and the clamping-bolts 5 tightened.

The feeler-vibrating mechanism comprises a link or rod g, pivotally connected at g with one of the lay-swords and having secured to its upper and rearwardly-extended end an L-shaped frame g2 g3, held in adjusted position by a suitable set-screw 8, the arm g3 being longitudinally slotted at g4, the upper side of the slot having a bevel-sided seat (Clearly shown in Fig. 6.) The slotted portion of the arm g3 travels between the arm F and the upturned guidef in such manner that when the loom is running properly the toe f will rest in its seat g5 by the weight of the actuating member g and the parts carried thereby, so that the reciprocatory motion given to said actuating member by the lay-sword will operate to rock the arm F', and thereby vibrate the feelers. When either feelerli` is engaged by an abnormallypositioned detector and the arm F is held stationary,the beveled sides of the seat g5 and toe f cooperate to lift the slotted arm g3, and thereby unseat the toe, as shown in Fig. 6, so that the longitudinal movement of the actuating member g can continue, the toe and its seat forming a slip connection between the arm g3 or actuator and the feeler. The upturned arm g2 of the frame carried by the These bunters obviously move in unison with the actuator of the feeler-vibrating mechanism and normally are out of the path of a controlling-dog h, mounted on a short rockshaft hx, adapted to rock in a bearing am on one of the brackets A4. The lower end of the dog is cut away to leave a depending guide-finger h extending adjacent the sides of the bun ters. A double wiper-cam h2 is secured, as by a set-screw l0, to the short shaft hx, the oppositely-extended toes of the cam normally resting against the offset ends h3 of a T-shaped casting H, slotted, as at h4, Fig. 7, to receive the shaft hx. The foot h5 of the casting has screwed thereinto a link 7i, extended forward and pivotally connected at k7 to a knock-off lever 118, fulcrumed at b9 (see Fig. 2) on the breast-beam of the loom.

Referring to Fig. '7, it will be obvious that whether the shaft hx be rocked in one or the other direction the wiper-cam will engage either the upper or lower portion h3 of the casting I-I and will move the latter rearwardly to draw the link h6 in the direction of the arrow 12, Figs. l and 2, and thereby operate i the knock-off lever hs to release the shipperhandle from its holding-notch. A spring .s is interposed between the shaft hx and the threaded end h5 of the casting H, said spring returning the casting and link h6 to normal or inoperative position when the wiper-cam h2 is in normal or inoperative position, Fig. 4.

From the foregoing description and the drawings it will be obvious that when the toe f is in its seat in the slotted arm gS the bunters gb' and g7 will in their reciprocating motion pass below the lip 15 of the controllingdog h, but when the toe is unseated it will act to lift the frame g2 g3 suiciently to bring the bunters into the path of said lip, and one or the other of said bunters will engage and rock the dog to thereby effect the operation of the knock-0E mechanism described.

If the actuator g of the feeler-vibrating mechanism is on its ou tward stroke,the bunter g6 will engage and rock the dog rearwardly, but if said actuator is on its inward stroke the shoulder g8 of the bunter g7 will engage the dog on its opposite side and will rock the same forward. The latter condition pertains in Fig. (5, where the bunter gis shown as just about to engage the controllingdog and swing it forward as the actuator g continues its inward stroke.

Should one of the detectors in the front scries drop, its copcrating feeler will be stopped by engagement therewith and the toe j" will be unseated on the rearward movement of the actuator g, and as such movement is completed the bunter g6 will engage and swing the controlling-dog.

It will be noticed that the connection between the knock-oif lever and the stop-motion mechanism is very direct and positive and that the bodily-movable part of the stop-motion mechanism can be readily moved upon IIO IZO

its supporting-brackets without interference with or disarrangement ofthe knock-oft mechanism or the feeler-vibrating mechanism.

The separator c serves as a back-stop or support for an abnormally-positioned feeler.

So far as I am aware it is broadly new to so construct and mount stop-motion mechanism as to be bodily movable on its fixed supports toward and from the front of the loom for any purpose whatsoever. It is also broadly new to utilize the feeler rock-shaft or rocker as a Warp-rest, and I believe it to be new to vibrate the feelers from a point practically in the plane of or adjacent the warp-threads. My invention is not therefore restricted to the precise construction and arrangement herein shown and described, as the same may be varied or rearranged in dierent particulars without departing froml the spirit and scope of my invention.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a loom, the main frame having bearings for the warp-beam, supports on the frame above said bearings and extended parallel to the loom sides, and Warp-stop-motion mechanism mounted upon and adapted to bel moved bodily upon said supports toward the front of the loom, to facilitate insertion or removal of the warp-beam.

2. In a loom, horizontally and forwardly extended supports on the loom sides, warpstop motion mechanism mounted on and adapted to be slid bodily upon said supports toward or away from the front of the loom, and means to secure said mechanism in place on the supports.

3. In a loom, forwardly-extended supports on the loom frame, and warp stop motion mechanism mounted to slide bodily on said 4 supports toward or from the front of the loom',

said mechanism including actuating-detectors controlled by the warp-threads, and a c0- operating, normally-vibrating feeler, to engage an abnormally-positioned detector.

4. In a loom, brackets mounted on the loom sides and having forwardly-extended supporting-arms, warp-stop-motion mechanism carried by said brackets and including depending end stands, a detector-support and warp-rest rigidly connecting them, actuatingdetectors vertically movable on the detectorsu pport and controlled by the warp-threads, a coperating feeler, and a rock-shaft to which said feeler is attached, mounted 'in bearings on the end stands, the latter having laterally-extended heads to rest upon the extended arms of the brackets.

5. In a loom, forwardly-extended supports on the loom sides above the warp-beam bearings, and warp stop motion mechanism mounted on an'd bodily movable relatively to said supports toward and from the front of the loom, said mechanism including actuating-detectors and a coperating vibrata-ble feeler, combined with a knock-oli device, and feeler-vibrating means, both supported on the loom-frame independently of the stop-motion mechanism and coperatively connected therewith.

6. In warp-stop motion mechanism for looms, a series of vertically-movable actuating-detectors maintained inoperative b v normal warp-threads, a fixed support for and relatively to which the detectors are longitudinally movable, a vibratable feeler to engage and be stopped byan abnormally-positioned detector, fixed and rocking shafts located in frontand behind the series of detectors, to form warp-rests, and connections between the .rocking shaft and feeler, to vibrate the latter.

7. In warp stop motion mechanism for looms, a series of actuating-detectors maintained inoperative by normal Warp-threads, a feeler to coperate with an abnormally-positioned detector, and an operating rockshaft for the feeler, said rock-shaft forming a warp-rest adjacent the detectors.

8. In warp stop motion mechanism for looms, a series of actuating-detectors main-` tained inoperative b v normal Warp-threads, a feeler to coperate with an abnormally-positioned detector, and an operating'member connected with and to normally vibrate the feeler, said member being located adjacent the plane of and forming a rest for the Warp threads.

9. In warp-stop motion mechanism for looms, two series of actuating-detectors maintained inoperative by normal warp-threads, a feeler to coperate with an abnormally-positioned detector of each series, and a rockshaft connected with and to normally vibrate the feelers, the rock-shaft being located between the series of detectors and also forming a'warp-rest.

IO. In warp-stopmotion mechanism for looms, two series of longitudinally-slotted actuating-detectors maintained inoperative by normal warp-threads, a support extended IOO IIO

through the slots of the detectors of each sef ries, a separator interposed between the lower ends of the two series, cooperating feelers, one for each series of detectors, a rock-shaft above the separator and forming a warp-restv between the two series of detectors,fand con- 'the toe while the actuator completes its movement.

l2. In warp-stop-motion mechanism for looms, the lay-sword-actuating detectors, a

vibratable feeler to cooperate with and be stopped by a detector in operative position, a rocker-arm movable with the feeler and provided with a toe, and a reciprocating actuator movable independently of the feeler and pivotally connected with the lay-sword and having a seat normally maintained in engagement with said toe, stoppage of t-he feeler unseating the toe, and stopping means operated by or through the actuator as it completes its stroke after the toe has been unseated.

13. In warp-stop-motion mechanism for looms,actuatingdetectors, a vibratable feeler to coperate with and be stopped by a detector in operative position, a rocker-arm movable with the feeler and provided with a toe, and a reciprocating actuator movable inde- -pendently of the feeler and having a seat to receive said toe and thereby normally vibrate the feeler, combined with a bunter carried by and rigidly connected with the actuator, and stopping means, including a dog, stoppage of the feeler unseating the toe and moving the bunter into position to engage said dog and `thereby operate the stopping means as the to normally receive the toe and thereby rock the shaft, stoppage of the feeler by engage- `ment with a detector operating to disengage said toe and seat, and stopping means for the loom actuated by or through the continued movement of the actuator after suchdisengagement of Ithe toe.

15. In a loom, a series of warp-stop-motion- .actuating detectors maintained inoperative by normal Warp-threads, a feeler to cooperate with an abnormally positioned detector, a rocker-arm connected with and to swing in unison with the feeler and having a toe, a reciprocating actuator movable independently of the feeler and held by gravity in operative engagement with the toe, stoppage of the feeler by an abnormally-positioned detector disengaging the toe and actuator, and stopi ping means for the loom operated by or through continued movement of the actuator after such disengagement.

16. In a loom, stop-motion-actuating detectors arranged in two series, a vibratable feeler for each, a connected rock-shaft, and a reciprocating actuator to normally rock said shaft and vibrate the feelers, combined with a shipper-handle, a knock-oif lever, a link connected therewith and provided with oppositely-extended arms, a double wiper-cam to engage one or other of said arms and operatively move the link to release the shipperhandle, and means intermediate said cam and actuator, to rock the former in one or the other direction upon stoppage of a feeler, such stoppage primarily disengaging the actuator and rock-shaft.

17. In a loom, two series of warp-stop-motion-actuating detectors maintained inoperative by normal Warp-threads, a vibratable feeler for each series,to engage and be stopped by an abnormally-positioned detector, feelervibrating means, two oppositely-acting bunters movable therewith, and stopping mechanism for the loom, including a controllingdog normally out of the path of movement of said bunters, stoppage of a feeler operating to disconnect the vibrating means and move one or other of the bunters into position to engage and move the dog.

18. In aloom, warp-stop-motion mechanism including two vibratable feelers,normallyop erative feeler vibrating means, two oppositely-acting hunters movable therewith, a shipper-lever, knock-0E mechanism therefor including a controlling-dog independent of the stop-motion mechanism and normally out of the path of movement of the bunters,and means operative upon stoppage of a feeler to disconnect the latter and its vibrating means and to move the corresponding bunter into position to engage the controlling-dog and thereby actuate the knock-off mechanism. 19. In a loom, stopping means therefor including a knock-off device, a double-throw wiper-cam to operatively move it, and an instrumentality operative upon failure of a Warp-thread to rock the Wiper-cam in one or the other direction.

20. In a loom, the shipper-handle, releasing means therefor, including a knock-off lever to release the shipper-handle, and a longitudinally-movable link having a transverse abutment, a rocking Wiper-cam to engage the abutment and move said link longitudinally, and means operative upon failure of a warpthread to actuate the wiper-cam.

21. In a loom, stopping means therefor, including a longitudinally-movable link, a double wiper-cam constructed and arranged to operatively engage and longitudinally move the link when rocked in either direction, and an instrumentality operative upon failure of a Warp-thread to rock the wiper-cam.

22. In aloom, stopping means therefor, in cluding a longitudinally-movable link, a double wiper-cam constructed and arranged to operatively move the link when rocked in either direction, and an instrumentality operative upon failure of a Warp-thread to rock the wiper-cam, said instrumentality including two series of detectors maintained inoperative by normal warp-threads, and devices intermediate the detectors and the wiper-cam, to rock the latter in one or other direction depending upon the series in which a detector has moved into operative position.

23. In a loom, stopping means therefor, including a pivotally-mounted, double wipercam, and a dog attached to and to rock said cam, stop motion actuating detectors, a1'- IOO IIO

ranged in two series and maintained in inoperative position by normal warp threads, means controlled by a detector in operative position to move the bunters into the path of the dog, and'two oppositely-acting bunters, one for each series of detectors, to coperate singly with the dog and rock the wiper-cam in one or the other direction.

24. In warp-stop-motion mechanism, two series of normally-inoperative actuating-detectors, two feelers, one for each series, vibratable toward and away from the detectors, and a common support for said feelers, located above the acting edges thereof and serving as a warp-rest.

25. In warp-stop-motion mechanism, two series of normally-inoperative actuating-detectors, a rock-shaft located below and forming a rest for the warp-threads, two sets of depending, diverging arms fast on said rockshaft, two feelers, each comprising` an angleiron attached to one of said sets of arms, with its acting edge located below the points of attachment to the arms, and two series of detectors maintained in inoperative position by normal warp-threads, and means to normally rock said shaft and thereby vibrate the feelers.

26. In warp-stop-motion mechanism for looms, actuating-detectors controlled by the warp-threads, a vibratabl feeler to coperate with and be stopped by a detector in operative position, an actuator for and to vibrate the fee-ler and movable independently of the latter, and a slip connection between the actuator and feeler, disconnected by stoppage of the feeler.

27. In warp-stop-motion mechanism for looms, actuating-detectors controlled by the warp-threads, a vibratable `feeler to coperate with and be stopped by a detector in operative position, an actuator for and to vibrate the feeler and movable independently of the latter, and a slip connection between the actuator and feeler disconnected by stoppage of the feeler, combined with stopping means for the loom, and a controlling-bunter therefor movable with said actuator.

28. In warp-stop-motion mechanism for looms, actuating-detectors controlled by the warp-threads, a vibratable feeler to coperate with and be stopped by a detector in operative position, an actuator for and to vibrate the feeler and movable independently of the latter, and a slip connection between the actuator and feeler, disconnected by stoppage of the feeler, combined with stopping means for the loom, including a dog, and two oppositely-acting bunters movable with the actuator and adapted to coperate singly with said dog.

29. In a loom,warpstoprnotion mechanism including two series of detectors maintained inoperative by normal warp-threads, two cooperating feelers, a common rock-shaft to which they are attached, an actuator for said rock-shaft, a slip connection between them, disconnected by stoppage of a feeler by a dropped detector; a shipper-lever, releasing means therefor including a controlling-dog, and oppositely-acting bunters adapted to cooperate singly therewith according to the lo 

